when you slow down training with more position the situation would be the same, because young player have a high value because their development potential which you should use ;)
And i won't say that they only got 3 potential years, maybe when you train centeras at single position in their a-skill, but that is a potential think ;)
And this is a game afterall, you could have complete draft and nearly no movement, to make it more realistic but did you like it?